KR101000433B1 - Fail safe controlling method of oil pump control unit for hybrid vehicle - Google Patents

Fail safe controlling method of oil pump control unit for hybrid vehicle Download PDF

Info

Publication number
KR101000433B1
KR101000433B1 KR20080123600A KR20080123600A KR101000433B1 KR 101000433 B1 KR101000433 B1 KR 101000433B1 KR 20080123600 A KR20080123600 A KR 20080123600A KR 20080123600 A KR20080123600 A KR 20080123600A KR 101000433 B1 KR101000433 B1 KR 101000433B1
Authority
KR
South Korea
Prior art keywords
oil pump
controller
motor
electric
hybrid vehicle
Prior art date
Application number
KR20080123600A
Other languages
Korean (ko)
Other versions
KR20100064939A (en
Inventor
공승기
Original Assignee
기아자동차주식회사
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 기아자동차주식회사, 현대자동차주식회사 filed Critical 기아자동차주식회사
Priority to KR20080123600A priority Critical patent/KR101000433B1/en
Publication of KR20100064939A publication Critical patent/KR20100064939A/en
Application granted granted Critical
Publication of KR101000433B1 publication Critical patent/KR101000433B1/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10Other safety measures
    • F04B49/103Responsive to speed

Abstract

The present invention relates to a failsafe control method of an oil pump controller for a hybrid vehicle, and more particularly, to failsafe (safety control in the event of a failure of a CAN communication line or failure of an electric oil pump and an oil pump controller for a hybrid vehicle). ) Or a failsafe control method that can secure vehicle running by controlling a lymph groove (failure mode minimum driving).
To this end, in the case of a CAN failure of the oil pump controller, the oil pump driver OPD can be controlled by directly connecting the TCU and the oil pump controller OPU with the hard wire pins. Normal driving is possible.
In addition, when the oil pump controller and the electric oil pump fail, the motor controller (MCU) controls the rotation speed of the electric oil pump motor, or turns on the UD_BRAKE (Under Driver BRAKE) until the mechanical oil pump is driven by the controller for the automatic transmission. On / off and slip control can be used to achieve limp home mode driving.
Figure R1020080123600
Hybrid vehicle, oil pump, oil pump controller, fail safe, lymph groove

Description

Fail safe control method of oil pump controller for hybrid vehicle {FAIL SAFE CONTROLLING METHOD OF OIL PUMP CONTROL UNIT FOR HYBRID VEHICLE}

The present invention relates to a failsafe control method of an oil pump controller for a hybrid vehicle, and more particularly, to failsafe or lymph groove control in case of a failure of an electric oil pump and an oil pump controller for a hybrid vehicle or an abnormality such as a CAN communication line. The present invention relates to a failsafe control method capable of ensuring vehicle running and enabling vehicle operation to a repair shop.

In general, in a hybrid vehicle, a mechanical oil pump mounted in an automatic transmission may supply hydraulic pressure in an automatic transmission (ATM) when the vehicle travels (automatic transmission input speed> 600prm).

In addition, the hybrid vehicle generates hydraulic pressure in the hydraulic circuit (valve body) and engine clutch in the automatic transmission even when the engine is stopped such as EV (Electric Vehicle) mode driving (or motor driving) running only with an electric motor and idling stop. In order to achieve this, an external electric oil pump (OP) is mounted separately to supply hydraulic pressure (eg 10.5 bar) inside the engine clutch and automatic transmission.

In the EV mode of driving the hybrid vehicle by the electric motor, the output torque of the electric motor is transmitted to the output shaft through the automatic transmission, so when the engine is stopped, hydraulic pressure is supplied from the electric oil pump to set the automatic transmission to a predetermined torque capacity. There is a need.

However, when the engine of the hybrid vehicle runs or stops at about 600prm or less, the electric oil pump fails or the motor of the electric oil pump is turned off due to a fault in the CAN communication line or the oil pump controller. The hydraulic supply to the transmission and the engine clutch becomes '0' or insufficient, and as a result, the output of the electric motor is not transmitted to the output member.

As a result, vehicle driving may be impossible, and vehicle fail-safe or limp-home control may be impossible, resulting in a difficulty in securing driving stability of the vehicle.

The present invention has been invented to solve the above problems, the vehicle's runability in the event of failure of the electric oil pump and oil pump controller (OPU) for the hybrid vehicle or failure (CAN) communication line, such as fail safe or lymph groove control It is an object of the present invention to provide a failsafe control method of a hybrid vehicle oil pump controller capable of securing the

To this end, in the event of a CAN failure, a hard wire can be used to control the automatic transmission controller (TCU) and the oil pump controller (OPU) directly by a wire pin, or by using a motor controller. Controls the motorized oil pump motor by detecting the rotational speed (Nmot) of the pump motor, or turns UD_BRAKE (Under Driver BRAKE) on or off until the mechanical oil pump is driven by the controller for automatic transmission (TCU). ) And slip (SLIP) control to enable control of the vehicle's lymphatic home.

In order to achieve the above object, the present invention provides a failsafe control method for an oil pump controller for a hybrid vehicle in which an input shaft rotation speed of a transmission (TM) is driven or stopped at 600 RPM or less.

(a) determining whether the oil pump system is off due to a failure of the oil pump controller and the electric oil pump or the CAN communication line for the oil pump controller is off; (b) if the CAN communication line is off, determining on / off of the hard wire; (c) When the hard wire is on in step (b), the motor of the electric oil pump is operated by directly connecting the controller for the automatic transmission and the oil pump controller using the hard wire to drive an oil pump driver. Making a step; (d) when the hard wire is off in step (b), controlling the oil pump driver by adjusting the rotation speed of the electric oil pump motor using the motor rotation speed (Nmot) of the motor controller; (e) When the CAN communication line of the oil pump driver is normal and the CAN communication line of the controller for the automatic transmission is broken in the step (d), the rotation speed of the electric oil pump motor using the motor controller. Operating by controlling; (f) if the CAN communication line of the oil pump driver is broken in step (d), operating the motor of the electric oil pump by driving the oil pump driver to the first stage at all times; (g) if the oil pump system is off, turning off the motor of the electric oil pump if the oil pump driver is fail or if the motor of the electric oil pump is failing. Provided is a failsafe control method for an oil pump controller for a hybrid vehicle.

In the failsafe control method of the oil pump controller for a hybrid vehicle according to the present invention, when a CAN failure of the oil pump controller occurs, the oil pump is directly connected to the automatic transmission controller (TCU) and the oil pump controller (OPU) by hard wire pins. The driver OPD can be controlled, thereby allowing normal driving.

In addition, when the oil pump controller and the electric oil pump fail, the motor controller (MCU) controls the rotation speed of the electric oil pump motor, or turns on the UD_BRAKE (Under Driver BRAKE) until the mechanical oil pump is driven by the controller for the automatic transmission. By controlling the on / off, the limp home mode driving can be obtained.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present disclosure, and the singular forms “a”, “an” and “the” include plural forms unless the context clearly indicates otherwise.

There may be a plurality of embodiments of the present invention, and overlapping descriptions of the same parts as in the prior art may be omitted.

The present invention transmits the output of the electric motor to the output member in the event of a failure of the electric oil pump or oil pump controller (electric oil pump controller, OPU) in the state that the input shaft rotation speed of the hybrid vehicle transmission is driven or stopped below 600 RPM, the normal vehicle After limiting the torque limit (Toque_Limit) of the motor controller (MCU) to enable control and fail-safe control or limp-home (LIMP-HOME), the minimum driving torque ( 5 ~ 10km / h) and creep torque to control the transmission and reduce the UD_BRAKE (Under Driver BRAKE) until the mechanical oil pump in the automatic transmission (ATM) is driven by the controller for automatic transmission (TCU). Control) ON / OFF.

In addition, when the CAN (CAN) abnormality of the oil pump controller (OPU) by using a hard wire (hard wire) pin directly connected to the controller for the automatic transmission and the oil pump controller to control the transmission and reception of the signal.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a view schematically showing a failsafe control process of an oil pump controller for a hybrid vehicle according to the present invention, and FIG. 3 is a system configuration diagram for the operation of an external electric oil pump.

The fail-safe control method of the oil pump controller (OPU) according to the present invention is a failure of the oil pump controller for controlling the electric oil pump (OP) and the electric oil pump when the engine of the hybrid vehicle is driven or stopped below 600 RPM. It is determined whether or not the CAN communication line of the oil pump controller is abnormal.

As shown in FIG. 1, in the case of a failure of a CAN communication line due to a time out or a bus off, the hard wire may be checked for abnormality.

In case of time-out or bus off, CAN communication line is off, but hard wire is on, so the controller for automatic transmission is connected to the controller of automatic transmission that controls automatic transmission by hard wire pin and oil pump controller. Send the speed command to the oil pump driver (electric pump driver, OPD).

Then, the OPD received the speed command is changed to three stages to operate the motor of the electric oil pump.

 On the other hand, if there is an error in the CAN communication line as well as the hard wire of the oil pump controller, the OPD itself is controlled by adjusting the motor speed Nmot through the motor controller (MCU) for motor control of the electric oil pump. do.

Here, for the self-control of the oil pump driver OPD for driving the electric oil pump, when the can for the OPD is normal and the can for the controller for the automatic transmission is faulty, through the motor controller. Motor of electric oil pump is operated by controlling motor speed (Nmot).

Alternatively, if the CAN for the OPD is broken, the motor of the electric oil pump is operated by always driving itself to the first stage without variably controlling the OPD regardless of the failure / normal of the CAN for the automatic transmission controller. Let's do it.

2 is a view showing a failsafe control condition according to the present invention when the oil pump system is off.

As shown in FIGS. 1 and 2, when an oil pump system such as an electric oil pump and an oil pump controller is broken, the oil pump driver OPD fails or the motor of the electric oil pump fails. The motor of the electric oil pump is turned off because it is in a fail state.

Then, since the electric oil pump cannot supply hydraulic pressure to the automatic transmission and the engine clutch, the mechanical oil pump in the automatic transmission is driven by the controller for the automatic transmission to drive the electric motor until hydraulic pressure is generated, thereby turning on / off the UD_BRAKE of the automatic transmission. The SLIP is controlled or the engine clutch is opened to load the lymph-off.

Then, when the OPU or oil pump itself breaks down, the vehicle will be able to drive at least (within 5 ~ 10km / h) and limit the torque of the electric motor to protect the automatic transmission.

Figure 4 is a graph showing the test results of loading the lymph off in accordance with the present invention.

Here, to protect the automatic transmission (ATM), it was tested whether the SUD on / off control of the UD_BRAKE in the automatic transmission controller was satisfied while satisfying the following conditions.

Conditions 1. The motor of the electric oil pump fails or the oil pump controller fails.

Condition 2.Accel Pedal Module is less than 10%

Condition 3. Drive Range

Condition 4. Electric motor is less than 700 RPM

As a result of satisfying all the above conditions 1 to 4 and limiting the OOD to less than 2km for durability of the automatic transmission, the UD_BRAKE in the automatic transmission (STM) is controlled to slip on / off and the warning light is turned on. It was confirmed that possible.

Therefore, according to the present invention, even in the case of a CAN failure of the oil pump controller, it is possible to control the oil pump driver (OPD) by connecting the controller for the automatic transmission and the oil pump controller by replacing the hard wire pin with a normal driving of the hybrid vehicle. This is possible.

When the oil pump controller (OPU) or the electric oil pump fails, the UD_BRAKE is controlled by slip on / off in the automatic transmission controller (TCU) so that the normal driving can be performed in the limp home mode.

For example, as shown in FIG. 4, when the APM is 0%, the electric motor is turned on, and then the creep can be driven at about 6 km / h by the UD_BRAKE control.

In addition, by limiting the APM to less than 10% to increase the speed of the electric motor to protect the automatic transmission, it is also possible to drive about 20km / h.

Although the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to these embodiments, the technical spirit of the present invention claimed in the claims by those skilled in the art to which the invention belongs. It includes all embodiments of the various forms that can be carried out without departing from the scope.

1 is a view schematically showing a failsafe control process of an oil pump controller for a hybrid vehicle according to the present invention.

2 is a view showing a failsafe control condition according to the present invention when the oil pump system is off;

3 is a system configuration diagram for the operation of the external electric oil pump

Figure 4 is a graph showing the test results of loading the lymph off according to the present invention

5 is a schematic diagram showing a part of a drive unit for a hybrid vehicle;

6 is a view schematically showing a failsafe control process of a conventional hybrid vehicle oil pump controller

Claims (2)

  1. In the fail-safe control method of the oil pump controller for a hybrid vehicle in which the engine is driven or stopped below 600 RPM,
    (a) determining whether the oil pump system is off due to a failure of the oil pump controller and the electric oil pump or the CAN communication line for the oil pump controller is off;
    (b) if the CAN communication line is off, determining on / off of the hard wire;
    (c) When the hard wire is on in step (b), the motor of the electric oil pump is operated by directly connecting the controller for the automatic transmission and the oil pump controller using the hard wire to drive an oil pump driver. Making a step;
    (d) when the hard wire is off in step (b), controlling the oil pump driver by controlling the rotation speed of the electric oil pump motor through a motor controller;
    (e) When the CAN communication line of the oil pump driver is normal and the CAN communication line of the controller for the automatic transmission is broken in the step (d), the rotation speed of the electric oil pump motor using the motor controller. Operating by controlling;
    (f) if the CAN communication line of the oil pump driver is broken in step (d), operating the motor of the electric oil pump by driving the oil pump driver to the first stage at all times;
    (g) if the oil pump system is off, turning off the motor of the electric oil pump if the oil pump driver fails or if the motor of the electric oil pump fails;
    Fail-safe control method of the oil pump controller for a hybrid vehicle comprising a.
  2. The method according to claim 1,
    In the step (g), if the APM (Accel Pedal Module) is less than 10%, the electric motor is less than 700 RPM and satisfies the drive range (Drive Range), the controller for the automatic transmission is a mechanical oil pump within a predetermined mileage A method of controlling a fail safe of an oil pump controller for a hybrid vehicle, characterized in that a slip (SLIP) or on / off control of UD_BRAKE (Under Driver BRAKE) is performed until it is driven.
KR20080123600A 2008-12-05 2008-12-05 Fail safe controlling method of oil pump control unit for hybrid vehicle KR101000433B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20080123600A KR101000433B1 (en) 2008-12-05 2008-12-05 Fail safe controlling method of oil pump control unit for hybrid vehicle

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR20080123600A KR101000433B1 (en) 2008-12-05 2008-12-05 Fail safe controlling method of oil pump control unit for hybrid vehicle
JP2009099804A JP2010132257A (en) 2008-12-05 2009-04-16 Fail-safe control method by fail-safe oil pump control unit for hybrid vehicle
US12/567,034 US8186967B2 (en) 2008-12-05 2009-09-25 Fail-safe control method for oil pump control unit of hybrid vehicle

Publications (2)

Publication Number Publication Date
KR20100064939A KR20100064939A (en) 2010-06-15
KR101000433B1 true KR101000433B1 (en) 2010-12-13

Family

ID=42231286

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20080123600A KR101000433B1 (en) 2008-12-05 2008-12-05 Fail safe controlling method of oil pump control unit for hybrid vehicle

Country Status (3)

Country Link
US (1) US8186967B2 (en)
JP (1) JP2010132257A (en)
KR (1) KR101000433B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101304885B1 (en) * 2011-09-01 2013-09-06 기아자동차주식회사 Control method of hybrid electric vehicle
KR101411598B1 (en) 2012-12-21 2014-06-25 엘지이노텍 주식회사 Electric Pump
KR101734577B1 (en) 2011-11-09 2017-05-11 현대자동차주식회사 Electric Vehicle Cooling System and Operation Method thereof

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101234642B1 (en) * 2010-12-07 2013-02-19 기아자동차주식회사 Limp home controlling systen of hybrid vehicle
KR20120063789A (en) * 2010-12-08 2012-06-18 기아자동차주식회사 Control method of asist pump for automatic transmission of vehicle provided with isg system
CN102173289B (en) * 2011-02-12 2012-11-28 广州汽车集团股份有限公司 Method for controlling automatic muting of volume of auto sound in the backing process
KR101348898B1 (en) * 2011-09-16 2014-01-07 주식회사 현대케피코 Control method for fail safety of hybrid vehicle
US8781696B2 (en) * 2012-06-01 2014-07-15 Caterpillar Inc. Variable transmission and method
US9650925B2 (en) * 2012-07-25 2017-05-16 Cummins Intellectual Property, Inc. System and method of augmenting low oil pressure in an internal combustion engine
KR101274137B1 (en) * 2012-08-10 2013-06-11 기아자동차주식회사 Limp home controlling method of hybrid vehicle
US10300779B2 (en) 2013-02-22 2019-05-28 Frampton Ellis Failsafe devices, including transportation vehicles
KR101481267B1 (en) 2013-05-20 2015-01-09 현대자동차주식회사 Failsafe apparatus and control method for vehicle
KR101490914B1 (en) * 2013-06-11 2015-02-09 현대자동차 주식회사 Oil pump system for hybrid vehicle and control method thereof
KR101620181B1 (en) * 2014-07-30 2016-05-13 현대자동차주식회사 Method and system for controlling electric oil pump
CN109624982A (en) * 2019-01-28 2019-04-16 汉腾汽车有限公司 A kind of plug-in hybrid-power automobile drive mode selection method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001206088A (en) 2000-01-26 2001-07-31 Fuji Heavy Ind Ltd Hybrid car controlling device
KR100836308B1 (en) 2007-06-19 2008-06-09 현대자동차주식회사 Control method of hybrid electric vehicle in oil pump/can fail

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3700776B2 (en) 2001-12-07 2005-09-28 アイシン・エィ・ダブリュ株式会社 Vehicle drive control device
JP2004322740A (en) * 2003-04-22 2004-11-18 Toyota Motor Corp Failure diagnosis device for vehicular control device
US6878083B2 (en) * 2003-08-01 2005-04-12 General Motors Corporation Pump speed compensation for transmission line pressure
JP3783716B2 (en) 2004-01-22 2006-06-07 トヨタ自動車株式会社 Control device for hybrid vehicle
JP4192907B2 (en) 2005-03-11 2008-12-10 トヨタ自動車株式会社 Auxiliary machine fault diagnosis device for hybrid system
JP4569493B2 (en) 2005-06-06 2010-10-27 日産自動車株式会社 Oil pump drive control device for hybrid vehicle
JP2007069788A (en) 2005-09-08 2007-03-22 Nissan Motor Co Ltd Failsafe unit for hybrid vehicle
JP4692622B2 (en) * 2008-12-12 2011-06-01 トヨタ自動車株式会社 Hydraulic control device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001206088A (en) 2000-01-26 2001-07-31 Fuji Heavy Ind Ltd Hybrid car controlling device
KR100836308B1 (en) 2007-06-19 2008-06-09 현대자동차주식회사 Control method of hybrid electric vehicle in oil pump/can fail

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101304885B1 (en) * 2011-09-01 2013-09-06 기아자동차주식회사 Control method of hybrid electric vehicle
KR101734577B1 (en) 2011-11-09 2017-05-11 현대자동차주식회사 Electric Vehicle Cooling System and Operation Method thereof
KR101411598B1 (en) 2012-12-21 2014-06-25 엘지이노텍 주식회사 Electric Pump

Also Published As

Publication number Publication date
US8186967B2 (en) 2012-05-29
JP2010132257A (en) 2010-06-17
US20100143156A1 (en) 2010-06-10
KR20100064939A (en) 2010-06-15

Similar Documents

Publication Publication Date Title
EP2516192B1 (en) Method and device for plausibility checking of a driving torque applied by an electrical engine in a hybrid drive of a motor vehicle
JP6169424B2 (en) Active air flap device for vehicle and fault diagnosis method
JP5031034B2 (en) Method of safe operation of hydraulic hybrid vehicle
JP5355553B2 (en) Brake device for commercial vehicles that can be pneumatically connected to a trailer and method of operating such a brake device in case of failure
AU2005232994B2 (en) Cargo handling device for cargo handling industrial vehicle
JP5286425B2 (en) Control apparatus and method for vehicle
KR101173050B1 (en) Drive control apparatus and method for electric oil pump
JP3805648B2 (en) Engine intake air amount control device
KR101381514B1 (en) Method for controlling a hybrid drive
US8862344B2 (en) Clutch actuator and method for the control thereof
KR101484215B1 (en) Method and system for starting engine when starter motor of hybrid electric vehicle is in trouble
JP5693003B2 (en) Compressed air supply device for commercial vehicles and commercial vehicles
KR100747303B1 (en) A control system for fail safety of hybrid vehicle
DE102007003813B4 (en) Error detection device and error detection method for a vehicle
JP2010105649A (en) Method of correcting clutch characteristic of hybrid vehicle
US8437897B2 (en) Method and device for controlling an electrical machine of a hybrid drive with increased availability
JP3847664B2 (en) In-vehicle engine controller
US6619259B2 (en) Electronically controlled throttle control system
US8548658B2 (en) Method for the fail-safe operation of a hybrid vehicle for the controlled initiation of a substitute measure allowing an operation of the vehicle under emergency conditions, and device for implementing this method
JP3835312B2 (en) Electronic control device for vehicle
DE112013003818T5 (en) Electric motor control means
KR20100123150A (en) Apparatus and method for detecting fault of automatic transmission based on shift by wire
JP2000025591A (en) Electric brake device for automobile
KR101484200B1 (en) System for fail safe controlling of hybrid vehicle and method thereof
JP2008508479A (en) Drive transmission system with electric oil pump

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20131129

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20141128

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20171129

Year of fee payment: 8